Lever-arm bucket



Oct.'2, 192s P. T. ROBIN ET AL LEVER AR BUCKET 2 Sheets-Sheet Filed June6, v 1927 I for the sheave bearing 20. The sheave hous 16 including thesheave 21 and its bear-- mg 20 ma .be mounted as a unit between t up ren 3 of the plates 15--15.

1 a ese plates 1515,are further provided .-with enlarged centralopenings 22 so as to permit thenhow slipped-over the opposite of themain rum or c linden casting 23. This latter casting, wh ch is of hollowform, is formed with a. pair of s ace'dannular flanges 24. Arranged-inara lel relationto the outer faces of these an es are secured the platesby means of bo ts or rivets 25. Pre erably the drum 23 is provided withfin ished bosses 37 arranged to fitsnugly within the central openings 22of the plates so that i substantially all of the strain which is trans-.mitted from the lever arm lates to the drum is taken .b'ythese bosseswit out imposing any strainupon the securing bolts .or rivets 25.

The opposite ends of the-drum 23 terminate in finished hubs 26 withinwhich is rotatably mounted the main hinge pin 27. It is preferable-toprovide a bushing 28 between the in- -ternalbearing surfaces of the hubsand the e pm. ".As most clearly appears in at inner end thereof isprovided with an --annular flange 29. Mounted u on each of thesehubs-26' with the inner end t ereof abuttin the fl mularflange 29 is theinner hinge co ar 30.? It is to be noted that the outer end of thecollar 30 terminates in the plane of the outer end ofgthe finished hub26. The 'outerhinge collars 32 fit snugly over the projeotin ends of themain hinlge pin 27 and are fix I against rotation wit respect theretobythtgrovision of dowel pins 33 passing through. e collars 32 andthehinge pin 27; In the constructionjust'described.itfwill beseen that theinner and outer hinge collars 3.0 and 32 are relativel rotatable, theshaft 27turningflin the hub ushings 28. It will.

'. further b'e seen that only one oint subject to lever am through whichsandor end'thruste isprovided at eit er side of the possibly work itsway between the caring surfaces of the inner hinges. In oder to proparly} provide for lubrication between these surfaces a. plug 34 ma beemfor lubricatin purposes; If desired,

- titled between thehllb casting 23 and. the

cant.-.

of em loying se arate'hin e mein hers and corner rackets or the buc et,the collars 30 and 32 are formed integrally thedepending cornerbrackets36 so as to obviate theinecessrty for separately riveting orbolting the-hinge and corner, bracket castings to thescoopsI1Q -10'" Notonly do A is entirel 1 between the it can whenever it s deemed desirab eto use-- ollowspace or'c amber whichiispro hinge pin 27- may befilledwith lubri I p I .5. Inabucket, thecombinationof apair combinedhinge and corner bracket castings aflord maximum strength in theseparts,'but

they also make ,itpracticable: to conduct the. machine work moreeconomicall at thesame timethat they-avoid the possibi 'tyioferrorswhich may occur when these parts are 's'epa rately riveted or otherwisesecured t0-the scoops.

- An important feature from the standpoint of manufacture .is thefacility with which the several component parts of'the bucket may befinished and assembled in final relation.

The lever arm-drum '23, being in the form of asingle casting can bereadily finished in the lathe, thus-considerably decreasing the costofproduction. The lever arm plates 15 are formed with their centralopeningsof a diameter suflicient to permit their bein readily slippedover the end hubs 26 after t e drum islied, it being further observedthat the, inges 30 can be slipped overthese -hubs afterwards. Stillfurther, the housing 16, regardless of whether it be for one or more;sheaves, may be mounted in position 1 plates secured thereto in spacedrelation and plates 15 with facility and when-..

constitutingthe. arm proper, and a sheave housing secured between theplates.

2. In a bucket the combination of a pair of scoop members, ahinge pin, alever arm hub mounted on the pin, and a pair ofindepen'd ently formedplatessecured thereto in spaced relation and constituting the armproper, said plates beingesecured at their lower ends to a scoop mem r.V

3. In a bucket the combination of a pair of scoop members, a hinge pin,a lever arm hub mounted on the pin, a pair of independently formed"plates secured thereto in proper, said plates being secured at theirspaced relation and constituting the. arm" lower ends to a scoop member,and asheave V housing secured between the plates.

of scoop members, a hinge pin, a lever. arm hub mounted on the-pin, apair of independently-formed plates secured thereto in spaced relationand constituting the arm proper, saidplates being secured at their.lower ends 4. In a bucket the combination of a pair toa scoopmember,asheave housing secured between the upper ends of said plates,and-a pair ofindependently formed scoop hinge members mountedon'the'hub.

of scoop members, a hinge pin, alever arm --for e acting relativerotation between 'said v posite ends in bearing hubs, a hinge pinaxially disposed within said casting with the opposite ends thereofprojecting beyond the outer edges of said hubs, and a pair of combinedhinge and corner bracket castings at opposite sides of the apparatus onecasting of each pair being slipped over said bearing.

hubs and the other being keyed to the projecting ends of said hinge pin.

8. A lever arm bucket apparatus including a transversely extending mainhinge pin, a lever arm drum surrounding said pin and a pair of inner andouter hinge members located at opposite ends of said pin and drum, saidinner hinge members being slipped over said end portions of the drum andsaid outer hinge members being keyed to said pin.

9. A lever arm bucket apparatus, in combination, a transverselyextending hollow casting provided with integrally formed annular flangesintermediate its ends, a hinge pin axially disposed within said casting,a pair of scoops respectively supported by said casting and said hingepin, a pair of plates secured one to each of said flanges, said platesextending in opposite directions from said flanges, and a sheave housingsecured between said plates to one side of said casting.

10. A lever arm bucket apparatus, in combination, a transverselyextending drum castsaid hubs, a

ing intermediate the opposite ends thereof, said casting beingPI'OVldBd'With a'longitudinally extending bore, a hinge pin axiallydisposed within said bore, the diameter of said pin being less than thediameter of the 1112101 extent of said bore, a pair of scoopsrespectively secured to said drum casting and to said hinge pin, a platesecured to each of said flanges, said plates extending in substantiallyopposite directions from said casting, and a sheave housin mountedbetween the portions of said p ates lying to one side of said casting,the opposite'end's of said plates being secured to one of said scoops.

11. A lever arm bucket apparatus including a transversely extendinghollow member, said member terminating at the opposite ends thereof inbearing hubs, apair of spaced annular flanges on said memberintermediate main hinge pin extending through the longitudinal bore ofsaid hollow member with the'opposite ends thereof supported in saidbearing hubs, and a pair of plates extending substantially at rightangles to said member, each of said lates'being secured to one ofsaidannular an es whereby to provide a lever arm for eflt'ectmg relativemovement between said member and said hinge pin.

In. testimony whereof, we have hereunto signed our names. v

PHILIP THEODORE ROBIN. I WILLIAM MAYO VENABLE.

,a pair of annular flanges on said casting.

